Curtain hook



FIG. 1 is a front elevational view of a curtain hook showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side elevational view, the opposite view being the mirror image thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a generally top frontal perspective view thereof. 

CLAIM The ornamental design for a curtain hook, as shown and described. 